/**
    平均几等分
*/
@mixin width_avg($x){
    width: (100%/$x);
}

.width_avg2{
    @include width_avg(2);
}

.width_avg3{
    @include width_avg(3);
}

.width_avg4{
    @include width_avg(4);
}

.width_avg5{
    @include width_avg(5);
}

.width_avg6{
    @include width_avg(6);
}